Landslides are common geomorphological processes that contribute to shape landscapes in all continents. To determine erosion rates in landscapes dominated by slope wasting processes, chiefly landslides, one needs to know: (i) the geographical distribution and abundance of landslides, (ii) the temporal frequency or the average landslide mobilization rates, and (iii) the volume of material mobilized by individual landslides. Information on landslide abundance and frequency can be obtained from multi-temporal landslide inventory maps, which can be prepared through the systematic interpretation of multiple sets of stereoscopic aerial photographs, high and very-high resolution, mono- and stereoscopic satellite images, and dedicated field campaigns executed after events that have resulted in landslides (event landslide inventory maps). Determining the volume of a single landslide is a complex problem that requires information on the surface and subsurface geometry of the slope failures, which is difficult to obtain. Deciding the volume of individual landslides in a large population of failures comprising hundreds or thousands of landslides is an even more difficult task (MALAMUD et alii, 2004) that, at present, can only be achieved adopting empirical relationships to link the volume (VL) of a landslide to geometrical measures of the slope failure, chiefly landslide area (AL).
Landslide volumes and evaluation of landslide mobilization rates in an area in Umbria, central Apennines
FIORUCCI, FEDERICA;ROSSI, MAURO;MONDINI, ALESSANDRO CESARE;SANTANGELO, MICHELE;VALIGI, Daniela
2010
Abstract
Landslides are common geomorphological processes that contribute to shape landscapes in all continents. To determine erosion rates in landscapes dominated by slope wasting processes, chiefly landslides, one needs to know: (i) the geographical distribution and abundance of landslides, (ii) the temporal frequency or the average landslide mobilization rates, and (iii) the volume of material mobilized by individual landslides. Information on landslide abundance and frequency can be obtained from multi-temporal landslide inventory maps, which can be prepared through the systematic interpretation of multiple sets of stereoscopic aerial photographs, high and very-high resolution, mono- and stereoscopic satellite images, and dedicated field campaigns executed after events that have resulted in landslides (event landslide inventory maps). Determining the volume of a single landslide is a complex problem that requires information on the surface and subsurface geometry of the slope failures, which is difficult to obtain. Deciding the volume of individual landslides in a large population of failures comprising hundreds or thousands of landslides is an even more difficult task (MALAMUD et alii, 2004) that, at present, can only be achieved adopting empirical relationships to link the volume (VL) of a landslide to geometrical measures of the slope failure, chiefly landslide area (AL).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
